LangChain announced on November 13 that it has raised $300 million in a Series C that values the company at $3 billion. The post, written by co-founder and CEO Harrison Chase, said the round was led by existing investor CapitalG, with significant participation from new investors GIC and DFJ Growth and existing investors IVP and Sapphire Ventures. TechCrunch's Julie Bort reported the same amounts the same day, describing Singapore's GIC among the participants, and wrote that the raise more than doubles the $1.25 billion valuation at which LangChain raised $125 million about a year ago, in a round led by IVP. CapitalG, in a post by Mo Jomaa and Alice Yang also dated November 13, said it was proud to lead the Series C about a year after its Series B investment.
Chase framed the raise around a mission he called enabling every company to "own its intelligence": choose models freely, control data and infrastructure, and keep improving agents under centralized governance. The company points to LangSmith as a framework-agnostic platform organized around three pillars, Agent Runtime, Agent Improvement and Agent Governance. Those pillars, in LangChain's description, cover LangGraph, Deep Agents, Agent Server and Sandboxes, observability and evaluation, an in-platform agent called LangSmith Engine that the company says finds errors and writes fixes, fine-tuning from traces, and LLM and Tool Gateways for budgets, data protection and tool access. Those product descriptions and the customer anecdotes in the post are LangChain's own account.
LangChain said more than 7,000 organizations already rely on LangSmith, naming startups such as Harvey, Rippling and Listen Labs and enterprises such as NVIDIA, Toyota and Salesforce. It said Clay uses LangSmith to monitor hundreds of millions of agent runs a month, and that Workday has used it to cut the time to deploy a new agent from five months to under a day. TechCrunch repeated the 7,000-customer claim and several of those names, and noted that other startups pitch similar advantages of not being locked to one model or cloud. CapitalG repeated the 7,000 figure and the Clay and Workday anecdotes, and added its own community metrics: it said LangChain's open-source projects, now including Deep Agents, see more than 350 million downloads a month, up from about 90 million monthly downloads for LangChain and LangGraph combined at the Series B.
Chase also thanked additional investors. He said the company was excited to welcome Salesforce Ventures, Insight Venture Partners, QuantumLight and MongoDB Ventures, and grateful to Sequoia, Amplify and Benchmark for putting more money into this round. Salesforce Ventures published its own November 13 note confirming participation in the $300 million Series C at a $3 billion valuation, led by CapitalG, and named Harrison Chase as CEO and Ankush Gola as CTO. CapitalG likewise named Ankush Gola and pointed to a special LangChain release event on November 20, which Chase's post also previewed as the date for several new LangSmith capabilities.
The headline funding figures are consistent across the company announcement, the lead investor's post and TechCrunch's report. Customer counts, download totals, workload volume and the Workday deployment-time comparison are company or investor claims and were not independently audited in these sources. No use-of-proceeds breakdown, official cap table, or general-availability details for the November 20 features were published in the materials reviewed.